Examine source code of Hole in a Wall

{
  "theme": {
    "images": {
      "theme_frame": "HoleintheWallH.jpg"
    },
    "colors": {
      "frame": "#ffffff",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "Hole in a Wall",
  "manifest_version": 2,
  "description": "old building with a hole in the wall, grunge, vintage, dirty, antique, broken down, My matching desktop wallpaper can be found at: <a href=\"https://outgoing.prod.mozaws.net/v1/5d239a7c55552cabe719f7ae7beed96a5a2e3da392c24fd8de2f2adb1921ff28/http%3A//architecture.desktopnexus.com/wallpaper/615331/\" rel=\"nofollow\">http://architecture.desktopnexus.com/wallpaper/615331/</a>"
}